Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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A cosmic ray muons tomography system with triangular bar plastic scintillator detectors and improved 3D image reconstruction algorithm: A simulation study

  • Yanwei Zhao (School of Nuclear Science and Technology, Lanzhou University) ;
  • Xujia Luo (School of Nuclear Science and Technology, Lanzhou University) ;
  • Kemian Qin (School of Nuclear Science and Technology, Lanzhou University) ;
  • Guorui Liu (School of Nuclear Science and Technology, Lanzhou University) ;
  • Daiyuan Chen (School of Nuclear Science and Technology, Lanzhou University) ;
  • R.S. Augusto (School of Nuclear Science and Technology, Lanzhou University) ;
  • Weixiong Zhang (The Third Institute of Geology and Minerals Exploration, Gansu Provincial Bureau of Geology and Minerals Exploration and Development) ;
  • Xiaogang Luo (The Third Institute of Geology and Minerals Exploration, Gansu Provincial Bureau of Geology and Minerals Exploration and Development) ;
  • Chunxian Liu (The Third Institute of Geology and Minerals Exploration, Gansu Provincial Bureau of Geology and Minerals Exploration and Development) ;
  • Juntao Liu (School of Nuclear Science and Technology, Lanzhou University) ;
  • Zhiyi Liu (School of Nuclear Science and Technology, Lanzhou University)
  • Received : 2021.08.11
  • Accepted : 2022.10.23
  • Published : 2023.02.25
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Abstract

Purpose: Muons are characterized by a strong penetrating ability and can travel through thousands of meters of rock, making them ideal to image large volumes and substances typically impenetrable to, for example, electrons and photons. The feasibility of 3D image reconstruction and material identification based on a cosmic ray muons tomography (MT) system with triangular bar plastic scintillator detectors has been verified in this paper. Our prototype shows potential application value and the authors wish to apply this prototype system to 3D imaging. In addition, an MT experiment with the same detector system is also in progress. Methods: A simulation based on GEANT4 was developed to study cosmic ray muons' physical processes and motion trails. The yield and transportation of optical photons scintillated in each triangular bar of the detector system were reproduced. An image reconstruction algorithm and correction method based on muon scattering, which differs from the conventional PoCA algorithm, has been developed based on simulation data and verified by experimental data. Results: According to the simulation result, the detector system's position resolution is below 1 ~ mm in simulation and 2 mm in the experiment. A relatively legible 3D image of lead bricks in size of 20 cm × 5 cm × 10 cm used our inversion algorithm can be presented below 1× 104 effective events, which takes 16 h of acquisition time experimentally. Conclusion: The proposed method is a potential candidate to monitor the cosmic ray MT accurately. Monte Carlo simulations have been performed to discuss the application of the detector and the simulation results have indicated that the detector can be used in cosmic ray MT. The cosmic ray MT experiment is currently underway. Furthermore, the proposal also has the potential to scan the earth, buildings, and other structures of interest including for instance computerized imaging in an archaeological framework.

Keywords

Acknowledgement

This work is financially supported by the Research Start-up Fund of Lanzhou University, the National Natural Science Foundation of China (11975115), the Fundamental Research Funds for the Central Universities (lzujbky-2019-54), and the Central-government Guidance Funds for Gansu's Development of Local Science and Technology (3D Mining Geo-tomography Based on Cosmic Ray Muons).

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